I was like 24.7% or something like that on the geek test.
I've seen episodes featuring every Doctor Who..
Most people in the U.S. always associate Tom Baker with the role and he did play the Doctor longer than anyone else. Jon Pertwee is my favorite because he was the most action oriented of the Doctors. Exiled on Earth for breaking the Timelords rules he worked for a United Nations organization called UNIT. He used Venusian karate and was the first Doctor to use the sonic screwdriver, plus he had a couple of verhicles, Bessie and the Whomobile.
It was very interesting how the Doctor evolves in each of his regenerations. One thing remained the same in all incarnations, he is arrogant. The regeneration thing itself was a gimmick to get around the fact that the actor (William Hartnell ) who played the Doctor was too frail to continue.
BBC is in the process of beginning production on a new Doctor Who series. Real Whovians will know this already, but here is the link to the BBC's cult page about Doctor Who. It includes a 1,200 page episode guide.http://www.bbc.co.uk/cult/doctorwho/index.shtml
By the way, is this geeky enough for you ?